Attachment for concrete-block machines



Oct. 23, 1928.

E. A. LONG ATTACHMENT FOR CONCRETE BLOCK MACHINES Filed Oct. 14, 1927 2Sheets-Sheet l Oct. 23, 1928. 4 1,688,627

- E. A. LQNG' ATTACHMENT FOR CONCRETE BLOCK MACHINES Filed 001:. 14,1927 2 Sheets-Sfieet 2 I EJwqrdflLogg, M/z, 4,,

Patented Oct. 23, 1928.

PATENT OFFICE.

EDWARD A. LONG, OF NEW CASTLE, PENNSYLVANIA.

ATTACHMENT FOR CONCRETE-BLOCK MACHINES.

Application filed October 14, .1927.

The object of this present invention, broadly stated, is the provisionof an attachment to be employed in connection with concrete blockforming machines, the same being simple in construction, positive in itsactions and results, automatic in its operation, easily installed inoperative position, and which can be manufactured and sold at a comparatively low price.

More specifically stated: My object is to provide a device to beconnected to a concrete block forming machine whereby wooden nailingblocks may be secured in the mold easily and quickly and then, after theconcrete block has been formed in the mold, the sup porting means forsaid wooden blocks will be automatically removed as the mold is beingopened to release the concrete block formed therein, and then againassuming operative position when the mold is being closed ready to formanother concrete block.

Other minor objects and particular advantages of the invention willsuggest themselves in the course of the following description, and thatwhich is new will be correlated in the appended claims. The preferredmeans for carrying out the principles of my invention in practical,efficient and economical manner, is shown in the accompanying two-sheetsof drawings, in which Figure 1 is a perspective view of a portion of aconcrete block forming machine, certain parts being omitted, in order toshow the interior thereof, and showing a portion of my invention.

Figure 2 is a face view of the same, certain parts being in section, andshowing a side elevation of my invention in operative position inconnection therewith.

Figure 3 shows certain parts of said machine, showing my invention inconnection.

therewith, the end-gates of the machine being partly opened, and certainparts of the machine being in section.

Figure 4 is a bottom plan view of the facplate, or base member of thecore-box of the machine.

Figure 5 is a top plan View of the facing plate support, or the base ofthe machine.

Figure 6 is a top plan view of the flatspring or main member of myinvention proper.

Figure 7 is an edge view or side elevation of my invention.

Serial No. 226,210.

Figure 8 shows one of the pointed pintles before being secured in placein connection with the main member of the invention.

Figure 9 is a perspective view of a concrete block, showing the nailingblock located therein.

Figure 10 is a longitudinal section of the block shown in F ig. 9, thesame being a central longitudinal section thereof.

Figure 11 a perspective view of a square nailing block.

And Figure 12 is a perspective view of a round nailing block.

Similar indices denote like parts throughout the several views.

In the following description I will designate the parts which are new bymeans of numerals, while the parts which are old will be designated byletters of reference. The parts which are old are shown merely to makeclear the purpose and the operation of my invention with relationthereto.

In order that the construction, the operation, and the severaladvantages of my invention may be more fully understood and appreciated,I will now take up a detailed description thereof, in which 1 will setforth the same as comprehensively as I may.

My invention comprises a relative long flat'spring, which may beconsidered as of three parts: A normally straight main portionor part 1,and the two outer parts, 2 and 3, which curve upwardly and outwardly atan angle from tl e ends of the part 1 of which they are continuationsand with which thev are integral. v

Formed through the center of said spring, that through the center of thepart 1, is an aperture l to receive the screw-bolt 5. Also formedthrough the part 1, near the ends thereof, are the pintle-apertures 6and 7. Also formed through the part 1, and located near the respectiveapertures 6 and 7, are the apertures 8 and 9, through which the bolts 12and 13 may freely operate. Said bolts 12 and 13 are adapted to retainthe facing plate F to the member A or base of the machine, ashereinafter explained.

1 ormed integral with the surfaces of the parts 2 and 3, and locatednear the free ends thereof, are the respective knobs, or catches, 10 and11, for the purpose hereinafter 6X' plained. Each of said bolts 12 and13 has a head on its upper end, and their lower-end portions arethreaded to receive thereon the respective nuts 14 and 15, for thepurpose hereinafter made clear.

Numerals 16 and 17 denote coil springs which loosely surround therespective bolts 12 and 13 and they are located between the member A ofthe machine and the underside of the member 1.

Two sharp-pointed pintles, 18 and 19, are provided which are secured intheir respective apertures 6 and 7. As is indicatech'the upper portionsof said pintles taper to sharp points and their lower portions arethreaded to receive thereon the respective nuts 20 and 21. Said pintlesare secured in operative po sition by first running the nuts on theirpintles; then inserting the lower ends of the pintles downward throughthe respective apertures 6 and 7; after which the lower protruding endportions of the pintles are riveted, that is battered as at 00 in Fig.7, until a head is formed thereby which is in contact with the undersideof the member 1, which, manifestly, will rigidly secure the pintles inoperative position, but if they should inadvertently become loosenedthey may beretightened by simply tightening down the nuts 20 and 21.

The above comprises all of the essential features of my invention, andthe parts remaining to be described are all of well known construction,but they are essential to the successful operation of my invention inconnection therewith, therefore the parts which are old will not bedescribed in minut-ia, but only such as will make clear the attachmentand the operation of my invention with relation thereto.

The machine with which my invention may be used comprises the facingplate support or base member A, from each end of which projects a pairof arms, B and B, left and right respectively.

The mold box is formed by the baclr C, the front (which is not shown),and the end gates D and E which extend between the front and the back.The bottom of the mold box is formed by the detachable facing plate F,shown inverted in Fig. 4, the upper face of which may be plain, orconfigured if so desired.

Extending downward from the outer face of each of the end gates, D andE, is a pair of supporting arms G and G, respectively, which are pivotedat their lower portions to the respective arms B and B whereby the endgates may stand vertical, that is in closed position as in Figs. 1 and2, or they may be turned outward into open position as in Figs. 3 and 5.

Formed on the underside of the plate F is a pair of securing prongs, 23and 23, for the purpose hereinafter made apparent.

' Said plate F is removably placed on the base A and it extends betweenthe front of the mold box, the back C thereof, and the end gates D andE, when the end gates are closed.

Said facing plate F has a central aperture- 22 to receive the end of thebolt 5; and it also has two unthreaded apertures therethrough in whichthe pintles 18 and 19 may freely operate.

Slots 25 and 25 are formed longitudinally through the base A, to receivethe respective '25 bolts 12 and 13 therethrough, as shown.

Letter H denotes a concrete block which has been formed in the mold boxof the machine, and sho-wing'a square nailing blockI, and a roundnailing block J, imbedded thereso in, although usually both of thenailing blocks would be either square or round, in cross section. Saidnailing blocks or Keys are fully set forth in Letters Patent No.1,583,077, issued to me on May 4, 1926.

In placing my invention in operative position, in connection with amachine, the procedure is substantially as follows: The pin tles 18 and19 at this time, or prior thereto, are secured in position in connectionwith 0" the main flat spring member, in the manner above set forth, asis clearly shown in Fig. 7 of the drawings.

First, the bolts 12 and 13 are positionedv with their heads in therespective prongs 23 9.: and 23 of the plate F. The flat spring member(comprising the parts 123) is then placed across the center of thebottom of the plate F, before said plate is inserted in the machine,with the pintles 18 and 19 entering their rspective apertures 24 and 24.The bolts 12 and 13 at the same time entering the respective apertures 8and 9 of the flat spring. The bolt 5 is then entered through theaperture A and run into the threaded aperture 22 of the facing plate,which will bring the central portion of the fiat spring tight againstthe underside of the plate F. The springs 16 and 17 are then placedaround the protruding portions of the respective bolts 12 and 13. in)

The facing plate F is then placed. upon the member A, with the bolts 12and 13 inserted through the slots. 25 and 25, respectively. The nuts 14and 15 are then run on the lower ends of the respective bolts 12 and '113, and then tightened up against the underside of the member A,therebycausing the springs 16 and 17 to press against the memher 1 ofthe flat spring and against the T116111? her A of the machine, therebyretaining the rm flat spring resiliently in contact with the undersideof the face plate F and with the facing plate rigidly in contact withthe member A of the machine.

At this point the invention will be in the position in which it is shownin Figs. 1 and 2, with the pointed end portions of the pintles 18 and 19projecting upward through the respective apertures 24 and 24:, into theinterior of the core box.

Lit.

The machine, with my invention attached, now being ready to form aconcrete block, the end gates being closed, therefore the pintles willbe projected into the core-box. Desiring to have nailing blocks, I or J,in the concrete block to be formed, therefore at this time one of thewooden nailing blocks is pressed onto each of said pintles whereby theywill be suspended inside the core-box, as shown in Figs. 2 and 3. Thematerial to form the concrete block is then placed in the core-box, andafter the concrete block has been formed and is ready to be removed fromthe core-box, then the core-box may be opened in the usual manner, oneoperation of which is to turn the end gates D and E outward anddownward, thereby bending the flat spring against its own resiliency andalso that of the coil springs 16 and 17 which, manifestly, will withdrawthe points of the pintles from the nailing blocks whereby they will notinterfere with the removal of the concrete block from the machine. Asthe cue gates are opened out it is evident that the members 2 and 3 ofthe flat spring will be engaged with the lower edges of the end gates,and finally the lower edges of the end gates will slide over therespective knobs 10 and 11, thereby locking the fiat spring in its bentposition until after the concrete block has been removed and the endgates are again closed ready to form a new concrete block, at which timethe flat spring will be free to move the pintles back to position readyto have other nailing blocks attached thereto, as before stated.

It is to be understood that I am not to be limited to the particularmake of machine herein shown, as my invention may be adapted to varioustypes and makes of concrete block forming machines without changing theprinciples of my invention as herein set forth and claimed. 1

I desire that it be understood that various changes may be made in thedetails of con struction herein set forth without departing from theprinciples of my invention and without sacrificing any of the advantagesthereof which are new and useful.

Iaving now fully shown and described my invention, and one manner of itsattachment and operation, what I claim and desire to secure by LettersPatent of the United States, 18-- 1. A flat spring rigidly secured inits central portion with the outer portions thereof adapted to be sprungup'and down, pointed pintles carried by the movable portions of saidspring, and knobs extending upwardly from the end portions of thespring.

2. A flat spring secured in its central portion with its outer portionsadapted to move resiliently up and down, pintles secured to said springand extending upwardly therefrom, catches formed on the outer portionsof the spring, bolts having their heads secured above said spring andextending downwardly through apertures in the spring and adjustablysecured below said spring, and coil springs surrounding said bolts andcontacting with said flat spring.

3.In combination with a concrete block forming machine having a blockforming enclosure, a flat spring extending under said enclosure andsecured in the center to the under side thereof, a pair of sharp pointedpintles secured to said spring and extending upward into said enclosure,and means whereby when the ends of said enclosure are being opened theends of said spring will bend downward whereby said pintles will bewithdrawn from the enclosure.

t. In combination with a concrete block forming machine having a blockforming enclosure with end gates adapted to be opened outward, a fiatspring extending under said enclosure and secured in its centralportion, coil spring-s adapted to normally press said flat springupward, pintles secured to said flat spring and extending upward in tothe interior of said enclosure but adapted to be withdrawn therefromwhen the ends of the fiat spring are bent downward in the operation ofopening said enclosure, and

means for retaining said pintles in withdrawn position when saidenclosure is opened.

5. In combination with a concrete block I forming machine having acore-box, a facing plate forming the bottom of the core-box, a base onwhich the facing plate rests, and end gates for the core-box; a fiatspring extending between the facing plate and the base and detachablysecured in its center to the facing plate, pintles extending from theflat spring through apertures in the facing plate with their pointsextending into the core-box but adapted to be withdrawn therefrom whenthe end portions of the flat spring are bent downward, bolts attached tothe facing plate and extending down through the fiat spring and thebase, nuts on the lower ends of said bolts contacting with the undersideof the base, a coil spring surrounding each of said bolts and compressedbetween the facing plate and said base, means whereby the end portionsof the flat spring will be bent down ward as the end gates are opened,and means for locking the end gates in open position whereby saidpintles will be held in withdrawn position with relation to the interiorof the core-box.

In testimony whereof I have hereunto subscribed my name to thisspecification and claims.

EDWARD A. LONG.

